/*!	 layerparamdisconnect.cpp
**	 Template File
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>

#include "layerparamdisconnect.h"
#include <synfigapp/canvasinterface.h>
#include <synfig/valuenodes/valuenode_dynamiclist.h>

#include <synfigapp/localization.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;

ACTION_INIT(Action::LayerParamDisconnect);
ACTION_SET_NAME(Action::LayerParamDisconnect, "LayerParamDisconnect");
ACTION_SET_LOCAL_NAME(Action::LayerParamDisconnect, N_("Disconnect Layer Parameter"));
ACTION_SET_TASK(Action::LayerParamDisconnect, "disconnect");
ACTION_SET_CATEGORY(Action::LayerParamDisconnect, Action::CATEGORY_LAYER | Action::CATEGORY_VALUENODE);
ACTION_SET_PRIORITY(Action::LayerParamDisconnect, 0);
ACTION_SET_VERSION(Action::LayerParamDisconnect, "0.0");
ACTION_SET_CVS_ID(Action::LayerParamDisconnect, "$Id$");

Action::LayerParamDisconnect::LayerParamDisconnect():
    time(0)
{

}

Action::ParamVocab
Action::LayerParamDisconnect::get_param_vocab()
{
    ParamVocab ret(Action::CanvasSpecific::get_param_vocab());

    ret.push_back(ParamDesc("layer", Param::TYPE_LAYER)
                  .set_local_name(_("Layer"))
                 );

    ret.push_back(ParamDesc("param", Param::TYPE_STRING)
                  .set_local_name(_("Param"))
                 );

    ret.push_back(ParamDesc("time", Param::TYPE_STRING)
                  .set_local_name(_("Time"))
                  .set_optional()
                 );

    return ret;
}

bool
Action::LayerParamDisconnect::is_candidate(const ParamList &x)
{
    return candidate_check(get_param_vocab(), x);
}

bool
Action::LayerParamDisconnect::set_param(const synfig::String& name, const Action::Param &param)
{
    if (name == "layer" && param.get_type() == Param::TYPE_LAYER) {
        layer = param.get_layer();

        return true;
    }

    if (name == "param" && param.get_type() == Param::TYPE_STRING) {
        param_name = param.get_string();

        return true;
    }

    if (name == "time" && param.get_type() == Param::TYPE_TIME) {
        time = param.get_time();

        return true;
    }

    return Action::CanvasSpecific::set_param(name, param);
}

bool
Action::LayerParamDisconnect::is_ready()const
{
    if (!layer || param_name.empty()) {
        return false;
    }

    return Action::CanvasSpecific::is_ready();
}

void
Action::LayerParamDisconnect::perform()
{
    if (!layer->dynamic_param_list().count(param_name)) {
        throw Error(_("Layer Parameter is not connected to anything"));
    }

    old_value_node = layer->dynamic_param_list().find(param_name)->second;
    layer->disconnect_dynamic_param(param_name);

    if (new_value_node || ValueNode_DynamicList::Handle::cast_dynamic(old_value_node)) {
        if (!new_value_node) {
            new_value_node = old_value_node->clone(get_canvas());
        }

        layer->connect_dynamic_param(param_name, new_value_node);
    } else {
        layer->set_param(param_name, (*old_value_node)(time));
    }

    layer->changed();
    old_value_node->changed();

    set_dirty(false);

    if (get_canvas_interface()) {
        get_canvas_interface()->signal_layer_param_changed()(layer, param_name);
    }
}

void
Action::LayerParamDisconnect::undo()
{
    layer->connect_dynamic_param(param_name, old_value_node);

    layer->changed();
    old_value_node->changed();

    set_dirty(false);

    if (get_canvas_interface()) {
        get_canvas_interface()->signal_layer_param_changed()(layer, param_name);
    }
}